Bug 1008340

Created attachment 798155 [details]
libvirt's log

Description of problem:
Cannot restore snapshot that contains memory state when the VM is set (in ovirt) with disabled/legacy usb support. it works fine when it is set with native usb support.
The error I see in libvirt's log is:
unsupported configuration: Target controller type ide does not match source usb

We're using the restoreFlags verb with XML which is based on the XML we got back from libvirt when the snapshot was taken.
I tried to use the restore verb with the same snapshot that failed to restore using restoreFlags and it worked, but I couldn't detect which configuration in the XML we send to the restoreFlags verb cause the problem. I compared the xml configuration libvirt stores in the binary file that contains the binary memory state, with the one we pass to the restoreFlags verb and besides aliases and id attribute for the 'domain' element, it looks very similar.

I'm attaching the libvirt log where on 7:41:13 you can see the xml we pass to the restoreFlags verb and right after that the error that is raised, and the xml configuration part in the file the ram was dumped to is pasted below.

Version-Release number of selected component (if applicable):
I'm using libvirt 1.0.5.5-1.fc19 & qemu 1.4.2-9.fc19.

BTW, it doesn't reproduce with libvirt 0.10.2-18.el6_4.9 & qemu-kvm-rhev 0.12.1.2-2.355.el6_4.7.

How reproducible:
100%

Steps to Reproduce:
Actual results:
Expected results:
see bz 1001709

Additional info:
LibvirtQemudSave^B^@^@^@?^R^@^@^A^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@<domain type='kvm'>
  <name>live_snapshot7</name>
  <uuid>f7f82714-253b-4a18-a01d-e35d4305aabe</uuid>
  <memory unit='KiB'>1048576</memory>
  <currentMemory unit='KiB'>1048576</currentMemory>
  <memtune>
    <min_guarantee unit='KiB'>1048576</min_guarantee>
  </memtune>
  <vcpu placement='static'>1</vcpu>
  <cputune>
    <shares>1020</shares>
  </cputune>
  <resource>
    <partition>/machine</partition>
  </resource>
  <sysinfo type='smbios'>
    <system>
      <entry name='manufacturer'>oVirt</entry>
      <entry name='product'>oVirt Node</entry>
      <entry name='version'>19-3</entry>
      <entry name='serial'>4C4C4544-0043-5610-8054-C7C04F44354A_18:03:73:21:48:8a</entry>
      <entry name='uuid'>f7f82714-253b-4a18-a01d-e35d4305aabe</entry>
    </system>
  </sysinfo>
  <os>
    <type arch='x86_64' machine='pc-i440fx-1.4'>hvm</type>
    <smbios mode='sysinfo'/>
  </os>
  <features>
    <acpi/>
  </features>
  <cpu mode='custom' match='exact'>
    <model fallback='allow'>Conroe</model>
    <topology sockets='1' cores='1' threads='1'/>
  </cpu>
  <clock offset='variable' adjustment='0' basis='utc'>
    <timer name='rtc' tickpolicy='catchup'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-kvm</emulator>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source file='/rhev/data-center/mnt/multipass.eng.lab.tlv.redhat.com:_export_images_rnd_ahadas_iso__domain/5e5d7267-6dc5-493a-af99-a786eb865642/images/11111111-1111-1111-1111-111111111111/Fedora-18-x86_64-Live-Desktop.iso' startupPolicy='optional'/>
      <target dev='hdc' bus='ide'/>
      <readonly/>
      <serial></serial>
      <boot order='1'/>
      <address type='drive' controller='0' bus='1' target='0' unit='0'/>
    </disk>
    <disk type='file' device='disk' snapshot='no'>
      <driver name='qemu' type='raw' cache='none' error_policy='stop' io='threads'/>
      <source file='/var/run/vdsm/storage/28d208e8-ce96-4cb8-80f7-b6b968490858/bf9b12e9-3e55-46e7-9935-6bbe3143570d/ad3c9415-9c1c-4466-b8fe-68d01204df63'/>
      <target dev='vda' bus='virtio'/>
      <serial>bf9b12e9-3e55-46e7-9935-6bbe3143570d</serial>
      <boot order='2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
    </disk>
    <controller type='scsi' index='0' model='virtio-scsi'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </controller>
    <controller type='usb' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
    </controller>
    <controller type='ide' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
    </controller>
    <controller type='virtio-serial' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </controller>
    <controller type='pci' index='0' model='pci-root'/>
    <interface type='bridge'>
      <mac address='00:1a:4a:16:01:b9'/>
      <source bridge=';vdsmdummy;'/>
      <model type='virtio'/>
      <filterref filter='vdsm-no-mac-spoofing'/>
      <link state='up'/>
      <boot order='3'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <channel type='unix'>
      <source mode='bind' path='/var/lib/libvirt/qemu/channels/f7f82714-253b-4a18-a01d-e35d4305aabe.com.redhat.rhevm.vdsm'/>
      <target type='virtio' name='com.redhat.rhevm.vdsm'/>
      <address type='virtio-serial' controller='0' bus='0' port='1'/>
    </channel>
    <channel type='unix'>
      <source mode='bind' path='/var/lib/libvirt/qemu/channels/f7f82714-253b-4a18-a01d-e35d4305aabe.org.qemu.guest_agent.0'/>
      <target type='virtio' name='org.qemu.guest_agent.0'/>
      <address type='virtio-serial' controller='0' bus='0' port='2'/>
    </channel>
    <channel type='spicevmc'>
      <target type='virtio' name='com.redhat.spice.0'/>
      <address type='virtio-serial' controller='0' bus='0' port='3'/>
    </channel>
    <input type='mouse' bus='ps2'/>
    <graphics type='spice' port='5900' autoport='yes' listen='0' keymap='en-us' passwd='*****' passwdValidTo='1970-01-01T00:00:01'>
      <listen type='address' address='0'/>
    </graphics>
    <video>
      <model type='qxl' ram='65536' vram='32768' heads='1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>
    <memballoon model='virtio'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
    </memballoon>
  </devices>
  <seclabel type='none'/>
</domain>
^@QEVM^@^@^@^C^A^@^@^@^B^